Added eventSchemaVersion for async schema

- Added event schema version in the request and response schema.
- Enhanced the mapper to adhere to new field.

Issue-ID: CPS-1145
Change-Id: I408f73adefc2104b2e421bc3a3fe8f78dcba80f0
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>
diff --git a/cps-ncmp-events/src/main/resources/schemas/dmi-async-request-response-event-schema-v1.json b/cps-ncmp-events/src/main/resources/schemas/dmi-async-request-response-event-schema-v1.json
index 528c063..2340a4b 100644
--- a/cps-ncmp-events/src/main/resources/schemas/dmi-async-request-response-event-schema-v1.json
+++ b/cps-ncmp-events/src/main/resources/schemas/dmi-async-request-response-event-schema-v1.json
@@ -31,6 +31,10 @@
           "description": "The event schema for async request response events.",
           "type": "string"
         },
+        "eventSchemaVersion": {
+          "description": "The event schema version for async request response events.",
+          "type": "string"
+        },
         "eventSource": {
           "description": "The source of the event.",
           "type": "string"
@@ -46,6 +50,7 @@
         "eventTarget",
         "eventType",
         "eventSchema",
+        "eventSchemaVersion",
         "eventSource",
         "eventContent"
       ]